The Eclipse Web Tools Platform Project provides tools for Web
Development, and is a platform for adopters making add-on tools for
Web Development.

Required
Prerequisites and Handy Extras

These are the prerequisites to install and run the Web Tools
Platform. Also listed are some frequently needed links for
committer-required packages when creating new development
environments, or targets to run against.

Note that WTP requires Java 5 or higher (and, for some things,
actually requires a JDK rather than only a JRE) even though many other
Eclipse Projects can
run with other
JRE levels.